Zaidan Hojin Handotai Kenkyu Shinkokai

Junichi Nishizawa

Ken-ichi Nonaka

Jun-ichi Nishizawa

Takashige Tamamushi

A thyristor device comprising an SI (Static induction) thyristor or beam base thyristor and an SIT (static induction transistor) or SIT-mode bipolar transistor connected to the gate of the thyristor in order to make it possible to turn-on and-off a direct current and voltage at a high speed with a light. In the thyristor part, the SIT gate structure or SIT-mode beam base structure exists in the first gate or base region or second gate or base region so that, at the time of the triggering operation, a very high switching efficiency will be obtained.

Light quenchable thyristor device

An integrated light-triggered and light-quenched static induction thyristor and fabrication process thereof adapted in such a manner that an integrated SIPT operates in the normal mode in order to enhance current gain, tail current generated at the light-quenching time is reduced in order to enhance turn-off gain, and an buried-gate type of light-triggered static induction thyristor and a photo-darlington circuit composed of a first and second static induction phototransistors are integrated on a high-resistivity substrate in order to permit manufacturing said thyristor compact as a whole in facilitated processes.

Method of making an integrated light-triggered and light-quenched static

An integrated light-triggered and light-quenched static induction thyristor and fabrication process thereof adapted in such a manner that an integrated SIPT operates in the normal mode in order to enhance current gain, tail current generated at the light-quenching time is reduced in order to enhance turn-off gain, and a buried-gate type of light-triggered static induction thyristor and a photo-darlington circuit composed of a first and second static induction phototransistors are integrated on a high-resistivity substrate in order to permit manufacturing said thyristor compact as a whole in facilitated processes.

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Sendai, Japan

Ken-ichi Nonaka